fix: sweep broke lp returned events #3385

Job	Run time
pre-check / cargo-clippy	3m 3s
pre-check / cargo-fmt	24s
build / compile (20.04)	5m 6s
pre-check / audit	3m 13s
build / compile (22.04)	5m 7s
pre-check / lint-ci-workflows	7s
pre-check / lint-bouncer	26s
test / coverage	5m 24s
pre-check / lint-dockerfiles (chainflip-broker-api, development)	13s
pre-check / lint-dockerfiles (chainflip-broker-api, production)	9s
pre-check / lint-dockerfiles (chainflip-cli, development)	11s
test / unit-tests	5m 0s
pre-check / lint-dockerfiles (chainflip-cli, production)	13s
pre-check / lint-dockerfiles (chainflip-engine, development)	14s
pre-check / lint-dockerfiles (chainflip-engine, production)	10s
pre-check / lint-dockerfiles (chainflip-lp-api, development)	11s
pre-check / lint-dockerfiles (chainflip-lp-api, production)	11s
pre-check / lint-dockerfiles (chainflip-node, development)	12s
pre-check / lint-dockerfiles (chainflip-node, production)	11s
pre-check / lint-dockerfiles (rust-base, development)	9s
pre-check / lint-dockerfiles (generate-genesis-keys, development)	12s
pre-check / lint-dockerfiles (chainflip-ingress-egress-tracker, development)	13s
post-check	1s
package	1s
docker	1s
publish	1s
merge-commit-summary	1s
	30m 24s

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